260406 has 48 divisors (see below), whose sum is σ = 640224. Its totient is φ = 76032.

The previous prime is 260399. The next prime is 260411. The reversal of 260406 is 604062.

260406 is a `hidden beast` number, since 260 + 406 = 666.

It is a super-2 number, since 2×260406² = 135622569672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a Curzon number.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7020 + ... + 7056.

It is an arithmetic number, because the mean of its divisors is an integer number (13338).

2²⁶⁰⁴⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320112).

260406 is an abundant number, since it is smaller than the sum of its proper divisors (379818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260406 is a wasteful number, since it uses less digits than its factorization.

260406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 260406 is about 510.2999118166. The cubic root of 260406 is about 63.8582474644.

Adding to 260406 its reverse (604062), we get a palindrome (864468).

It can be divided in two parts, 260 and 406, that added together give a palindrome (666).

The spelling of 260406 in words is "two hundred sixty thousand, four hundred six".